Question

所以，在我的上一个问题（“无法弄清楚如何在java中重叠图像”）中，我建议使用布局管理器和JLayeredPane。然而，在研究了演示并形成我自己的代码之后，我遇到了34个编译错误。编译器错误始终是“”，因此导入可能有问题。但是我完全从LayeredPane演示中复制了导入列表。再一次，我很难过。还有一次，我提前感谢任何人的建议！

import javax.swing.*;
import javax.swing.border.*;
import javax.accessibility.*;

import java.awt.*;
import java.awt.event.*;


public class SlotAnimatorTest extends JPanel
{
  JPanel pane = new JPanel ();
  pane.setPreferredSize(new Dimension(1500, 1500));
  JPanel slotAnim;

  private JPanel showSlotAnimators ()
  {
    slotAnim = new JPanel ();

    SlotAnimator a0 = new SlotAnimator (45);
    SlotAnimator a1 = new SlotAnimator (90);
    SlotAnimator a2 = new SlotAnimator (180);

    slotAnim.setLayout (new GridLayout (3,0,20,30));
    slotAnim.add (a0);
    slotAnim.add (a1);
    slotAnim.add (a2);

    return slotAnim;
  }

  ImageIcon background = new ImageIcon ("/Users/haleywight/Documents/slotmachine.png");
  JLabel bG = new JLabel (background);
  bGsetBounds(1500, 760, background.getIconWidth(), background.getIconHeight());
  pane.add (bG, newInteger(0),0);

  pane.add (showSlotAnimators (), newInteger (1));

      private static void createAndShowGUI() 
      {

        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JComponent newContentPane = new SlotAnimatorTest();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
     }

  public static void main (String [] args)
    {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }

}

Answer 1

这与JLayeredPane无关，与基本Java有很大关系。您不能在类和方法或构造函数或静态/非静态初始化程序块之外调用方法。

Answer 2

以下陈述必须放在方法内。

bGsetBounds(1500, 760, background.getIconWidth(), background.getIconHeight());
pane.add (bG, newInteger(0),0);
pane.add (showSlotAnimators (), newInteger (1));

使用JLayeredPane时，不知道编译器错误在哪里形成

2 个答案: